What case law is that, pray tell?
There are references to alleged case law. The kicker here is how fundamentalist are we getting about the Constitution. A high degree is urged by most modern conservatives and the 2nd Amendment is about as good a rationale as any, because otherwise we could Congressionally redefine infringement and regulated and have all sorts of mischief going on.
We need a Gordian knot cutter here or we chase our own tails.